Communication Technical Services

HF100 Series – 10kW HF Wide Band Antenna Matching

HF100 Series
The HF100 Series are 10 kW average power silicone cooled transformers suitable for communication or broadcast systems.

The units are housed in a finned cast aluminium tank which provides excellent natural convection cooling. Each casting is subjected to a double vacuum resin impregnation process which ensures complete sealing for the internal low loss silicone cooling oil.

  • Wide band 1.5 to 32 MHz
  • 10 kW average + 100% AM modulation
  • Suitable for communications or broadcast applications
  • Very high efficiency
  • All weather unprotected operation

High purity alumina ceramic insulators with arcing horns are fitted as standard and an integral static drain to earth provides additional protection against lightning induced high voltages.

A wide selection of unbalanced and balanced impedance ratios are available to complement most antenna configurations and enquiries for non-standard arrangements are welcome.

The HF100 is a high quality unit suitable for unprotected operation in any environment.

HF100 Dimensional Drawing

 

Type Designations for HF100 Series and Technical Specification

Balance Impedance (ohm)
Unbalanced impedance (ohm)
50
75
100
200
300
370
450
600
50
HF100-55
HF100-57
HF100-510
HF100-520
HF100-530
HF100-537
HF100-545
HF100-560
75
HF100-75
HF100-77
HF100-710
HF100-720
HF100-730
HF100-737
HF100-745
HF100-760

 

Frequency: 1.5 – 32 MHz
Impedance: See table above
Power: 10 kW average + 100% am modulation
Insertion loss: Less than 0.2 dB
VSWR: Less than 1.2:1 (2 – 30 MHz), Less than 1.3:1 (1.5 – 32 MHz)
Balance ratio: Greater than 26 dB
Load VSWR: 2.5:1 max.
Coaxial connectors: 7/8″, 1 5/8″, 3 1/8″ EIA
Balance terminals: Alumina ceramic M10 thread
Temperature range:  -40ºC to +55ºC
Weight: 60kg gross
High voltage protection: Arcing horns and internal static drain
Configuration: Cast aluminium case (LM25). Hermetically sealed. Epoxy paint finish.
Cooling: Natural convection, silicone transformer oil, pressure relief valve fitted.
Shipping dimensions: 700 x 600 x 500 mm approx.
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